I ran it one season in my Blackbird and for street use saw no differance since my cooling system was in great shape. That said though its greatest benefit was for the track since if you spill it on the tack it does not become a slip and slide. That end also as a coolant it functions great however you can not use glycol based coolant on the tracks so they really upsell it, but for the street use I saw no conceivable differance.